EP4074992A1 - Vis à bois - Google Patents

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Publication number
EP4074992A1
EP4074992A1 EP21191004.7A EP21191004A EP4074992A1 EP 4074992 A1 EP4074992 A1 EP 4074992A1 EP 21191004 A EP21191004 A EP 21191004A EP 4074992 A1 EP4074992 A1 EP 4074992A1
Authority
EP
European Patent Office
Prior art keywords
shank
outer edge
wood screw
ribs
main thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21191004.7A
Other languages
German (de)
English (en)
Other versions
EP4074992C0 (fr
EP4074992B1 (fr
Inventor
Chao-Wei Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kwantex Research Inc
Original Assignee
Kwantex Research Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kwantex Research Inc filed Critical Kwantex Research Inc
Publication of EP4074992A1 publication Critical patent/EP4074992A1/fr
Application granted granted Critical
Publication of EP4074992C0 publication Critical patent/EP4074992C0/fr
Publication of EP4074992B1 publication Critical patent/EP4074992B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0068—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw with multiple-threads, e.g. a double thread screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30—Locking exclusively by special shape of the screw-thread

Definitions

  • the disclosure relates to a screw, more particularly to a wood screw for screwing into wood.
  • a wood screw 1 for screwing into wood is disclosed in Taiwanese Utility Model Patent No. 301373 .
  • a screw shank 11 of the wood screw 1 is provided with a plurality of spiral cutting threads 13 in the same direction as a main thread 12 thereof.
  • the spiral cutting threads 13 are arranged in parallel and are spaced apart from each other in an axial direction of the screw shank 11.
  • the spiral cutting threads 13 can achieve a certain degree of reduction of the resistance, due to improper design and quantity configuration of the cutting threads 13, the wood screw 1 can cause problems, such as laborious application of force, excessive damage to wood fibers, etc.
  • the wood screw 1 after being screwed into the wood for a period of time, the wood screw 1 is easy to loosen in a reverse direction due to factors, such as vibration or weather, causing danger to a building structure.
  • an object of the present disclosure is to provide a wood screw that has anti-cracking and anti-loosening functions.
  • a wood screw of this disclosure includes a head, a shank, a main thread and a plurality of circumferentially spaced-apart forward ribs.
  • the shank axially extends from the head, and has a main shank portion connected to the head, and a conical tip portion extending from the main shank portion in a direction away from the head and gradually tapering to form a conical tip end.
  • the main thread protrudes from the shank and extends helically around the shank from the main shank portion to the conical tip end in a tightening direction.
  • the main thread has an outer diameter ranging from 3 mm to 16 mm.
  • each forward rib protrude from the shank and extend spirally around the shank from the main shank portion to the conical tip portion in a same direction as the main thread.
  • the forward ribs are spaced apart from the conical tip end by a distance.
  • the number of the forward ribs ranges from three to five.
  • each forward rib has a first outer edge connected to the shank and facing the tightening direction, and a second outer edge connected to the first outer edge and the shank and facing opposite the tightening direction.
  • the second outer edge has a length shorter than a length of the first outer edge.
  • Each forward rib has a height in a radial direction of the shank smaller than a height of the main thread in the radial direction of the shank, and a lead angle greater than a lead angle of the main thread.
  • FIGS. 2 to 4 illustrate a wood screw 2 according to the first embodiment of the present disclosure.
  • the wood screw 2 is screwed into wood (not shown) along a tightening direction (A) when in use, the tightening direction (A) may be a clockwise or a counterclockwise direction
  • FIG. 3 is a sectional view taken along line B-B of FIG. 2 .
  • the wood screw 2 includes a head 21, a shank 22, a main thread 23, and a plurality of forward ribs 24.
  • the shank 22 axially extends from the head 21, and has a main shank portion 221 connected to the head 21, and a conical tip portion 222 extending from the main shank portion 221 in a direction away from the head 21 and gradually tapering to form a conical tip end 223.
  • the main thread 23 protrudes from the shank 22 and extends helically around the shank 22 from the main shank portion 221 to the conical tip end 223 in the tightening direction (A).
  • the main thread 23 has an outer diameter ranging from 3 mm to 16 mm.
  • a distance between the main thread 23 and the head 21 can be freely determined according to the requirement. Of course, there may be no distance between the main thread 23 and the head 21.
  • the forward ribs 24 protruding from the shank 22, are circumferentially spaced apart from each other, and extend spirally around the shank 22 from a lower portion of the main shank portion 221 to the conical tip portion 222 in the same direction as the main thread 23, but are spaced apart from the conical tip end 223 by a distance.
  • the forward ribs 24 are equiangularly spaced apart from each other, and each forward rib 24 extends about 150 to 270 degrees around the shank 22 in the tightening direction (A).
  • the number of the forward ribs 24 is three. In other embodiments, the number of the forward ribs 24 may be four or five depending on the outer diameter of the main thread 23.
  • the number of the forward ribs 24 is three; when the outer diameter of the main thread 23 is larger than 10 mm but smaller than or equal to 14 mm, the number of the forward ribs 24 is four; and when the outer diameter of the main thread 23 is larger than 14 mm but smaller than or equal to 16 mm, the number of the forward ribs 24 is five.
  • Each forward rib 24 has a height (h1) in a radial direction of the shank 22 smaller than a height (h2) of the main thread 23 in the radial direction of the shank 22, and a lead angle ( ⁇ ) greater than a lead angle ( ⁇ ) of the main thread 23.
  • the lead angle ( ⁇ ) is within the range of 50 to 60 degrees.
  • each forward rib 24 has a first outer edge 241 connected to the shank 22 and facing the tightening direction (A), and a second outer edge 242 connected to the first outer edge 241 and the shank 22 and facing opposite the tightening direction (A).
  • first outer edge 241 extends outwardly from the shank 22 in a direction opposite to the tightening direction (A)
  • the second outer edge 242 extends outwardly from the shank 22 in a direction toward the tightening direction (A) and is connected to the first outer edge 241 at one end thereof that is distal to the shank 22.
  • the second outer edge 242 has a slope steeper than a slope of the first outer edge 241.
  • the first outer edge 241 has a length (L1) greater than a length (L2) of the second outer edge 242.
  • the ratio of the length (L1) of the first outer edge 241 to the length (L2) of the second outer edge 242 ranges from 1.25 to 2.6.
  • the first outer edge 241 of each forward rib 24 serves as a pushing surface that drives into the wood to gradually expand the hole without completely destroying the wood fiber in the original position, which not only reduces the driving torque of the wood screw 2, but also because part of the wood material recovers inertially and covers the wood screw 2, the safe pull-out force of the wood screw 2 can be maintained.
  • each forward rib 24 serves as a blocking surface when the wood screw 2 is rotated in a direction reverse to the tightening direction (A) to provide a corresponding resistance for preventing the wood screw 2 from loosening in the direction reverse to the tightening direction (A).
  • L1/L2 the length ratio of the first outer edge 241 and the second outer edge 242 ranges within 1.25 to 2.6, the effects of anti-cracking and anti-loosening can be simultaneously achieved.
  • each of the first outer edge 241 and the second outer edge 242 may be, according to the requirement, a straight line, a curved line facing toward the shank 22, or a curved line facing away from the shank 22.
  • the first outer edge 241 and the second outer edge 242 can be matched with each other, as shown in FIGS. 5 to 8 , and can be interchanged arbitrarily according to the requirement.
  • the first outer edges 241 of the forward ribs 24 can drive into the wood with low driving torque to gradually expand the hole without completely destroying the wood fiber in the original position, apart from reducing the driving torque during the screwing process, the construction efficiency can be promoted as well. Then, through the coordination of the size of the outer diameter of the main thread 23 and the number of the forward ribs 24, and with part of the wood material returning to its original position by inertia to cover the wood screw 2, the safe pull-out force of the wood screw 2 can be maintained, and, because the wood fiber is not completely destroyed, the safety strength of the wood can be maintained.
  • each forward rib 24 can generate a corresponding resistance when the wood screw 2 rotates in the reverse direction to prevent the wood screw 2 from loosening, thereby maintaining the wood screw 2 screwed to the wood.
  • the anti-cracking and anti-loosening effects of the wood screw 2 can be simultaneously achieved.
  • the length ratio (L1/L2) of the first and second outer edges 241, 242 a double effect improvement of construction efficiency and structural safety can be achieved.
  • the second embodiment of the wood screw 2' is shown to be similar to the first embodiment, but differs in that, in the second embodiment, the wood screw 2' further comprises a plurality of reverse ribs 25 protruding from the shank 22 and spirally extending around the shank 22 in a direction opposite to the forward ribs 24.
  • the reverse ribs 25 intersect with the forward ribs 24, and cooperate with the same to define a plurality of chip-receiving grooves 26.
  • the number of the reverse ribs 25 corresponds to the number of the forward ribs 24. However, the number of the reverse ribs 25 may be one according to the requirement.
  • Each reverse rib 25 has a height (h3) in the radial direction of the shank 22 smaller than the height (h1)of each forward rib 24.
  • each reverse rib 25 has a first outer edge 251 connected to the shank 22 and facing the tightening direction (A), and a second outer edge 252 connected to the first outer edge 251 and the shank 22 and facing opposite the tightening direction (A).
  • a length (L3) of the first outer edge 251 may be greater or smaller than a length (L4) of the second outer edge 252.
  • the design of the second embodiment can be adopted according to the actual screwing requirement and the application environment (for example, environment with frequent vibration or large climate change).
  • the reverse ribs 25 Through the reverse ribs 25, the area of the blocking surface that prevents reverse loosening of the wood screw 2' can be increased to enhance the anti-loosening effect.
  • the forward ribs 24 have driven into the wood with low driving torque, and since the height (h3) of each reverse rib 25 is smaller than the height (h1)of each forward rib 24, the addition of the reverse ribs 25 will not cause the wood screw 2 to generate additional resistance when it is driven into the wood, thereby promoting construction efficiency and improving safety.
  • the chip-receiving grooves 26 can evenly accommodate the wood chips generated during screwing to avoid uneven distribution of wood chips which causes squeezing of the accumulated wood chips, so that the effect of preventing the wood from cracking can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geometry (AREA)
  • Physics & Mathematics (AREA)
  • Wood Science & Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Connection Of Plates (AREA)
  • Joining Of Corner Units Of Frames Or Wings (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
  • Materials For Medical Uses (AREA)
  • Polyesters Or Polycarbonates (AREA)
EP21191004.7A 2021-04-13 2021-08-12 Vis à bois Active EP4074992B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW110113237A TWI768825B (zh) 2021-04-13 2021-04-13 螺絲

Publications (3)

Publication Number Publication Date
EP4074992A1 true EP4074992A1 (fr) 2022-10-19
EP4074992C0 EP4074992C0 (fr) 2024-04-10
EP4074992B1 EP4074992B1 (fr) 2024-04-10

Family

ID=77316872

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21191004.7A Active EP4074992B1 (fr) 2021-04-13 2021-08-12 Vis à bois

Country Status (5)

Country Link
US (1) US12055174B2 (fr)
EP (1) EP4074992B1 (fr)
JP (1) JP7318976B2 (fr)
CN (1) CN115199628A (fr)
TW (1) TWI768825B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4488532A1 (fr) * 2023-07-04 2025-01-08 Taiwan Shan Yin International Co., Ltd. Vis

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD996962S1 (en) 2020-11-17 2023-08-29 National Nail Corp. Screw
CA3182597A1 (fr) * 2021-11-23 2023-05-23 Omg, Inc. Attache filetee avec diametre interieur festonne
AT526693B1 (de) * 2023-04-24 2024-06-15 Avvio Gmbh & Co Kg Schraube
EP4567288A1 (fr) * 2023-12-05 2025-06-11 Taiwan Shan Yin International Co., Ltd. Vis
USD1076656S1 (en) * 2024-01-24 2025-05-27 Kwantex Research Inc. Screw
USD1076657S1 (en) * 2024-01-24 2025-05-27 Kwantex Research Inc. Screw

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW301373U (en) 1995-07-26 1997-03-21 guo-tai Xu Improved structure of screw
DE29824767U1 (de) * 1998-02-25 2002-08-29 Ludwig Hettich & Co., 78713 Schramberg Schraube
DE202009016518U1 (de) * 2009-11-30 2010-03-04 Ho, Jen-Tong Schraube
EP3401557A1 (fr) * 2017-05-12 2018-11-14 Profix AG Vis à bois
EP3225858B1 (fr) * 2016-03-30 2018-12-12 Kuo-Tai Hsu Vis
TWM588178U (zh) * 2019-09-09 2019-12-21 吉瞬興業股份有限公司 木螺絲結構

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JPH041371Y2 (fr) 1987-02-16 1992-01-17
JP2866462B2 (ja) 1990-07-13 1999-03-08 オーエスジー販売株式会社 ねじ及びそれを形成するための転造ダイス
JP3046466B2 (ja) * 1992-12-25 2000-05-29 輝文 野地川 ねじおよびその製造方法
AU697092B2 (en) * 1995-12-05 1998-09-24 Kuo-Tai Hsu Pilot screw
JPH11230141A (ja) * 1998-02-19 1999-08-27 Yao Seibyou Kk 木ねじ
US6328516B1 (en) * 2000-03-28 2001-12-11 Ludwig Hettich & Co. Screw with cutting edge
JP2009264395A (ja) 2008-04-22 2009-11-12 Dandori Vis Kk 木枠調整用木ねじ
TWM369396U (en) * 2009-07-22 2009-11-21 Jau Yeou Industry Co Ltd Cracking-proof wood screw
US20130039720A1 (en) * 2011-08-11 2013-02-14 Sheng-Tsai SHIH Screw
TWM491743U (zh) * 2014-09-04 2014-12-11 Kwantex Res Inc 木螺絲
US9957994B2 (en) * 2016-05-25 2018-05-01 Kuo-Tai Hsu Screw
AU201614802S (en) * 2016-08-31 2016-09-30 Illinois Tool Works A screw fastener
EP3677800A1 (fr) 2019-01-04 2020-07-08 Kuo-Tai Hsu Vis à bois
US11137012B2 (en) * 2019-02-21 2021-10-05 Kuo Tai Hsu Wood screw
TWM590200U (zh) * 2019-10-04 2020-02-01 震南鐵線股份有限公司 螺絲結構
TWM604844U (zh) * 2020-09-03 2020-12-01 吉瞬興業股份有限公司 低磨損螺絲結構
US11598363B2 (en) * 2020-09-23 2023-03-07 Bi-Mirth Corp. Low-wear screw structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW301373U (en) 1995-07-26 1997-03-21 guo-tai Xu Improved structure of screw
DE29824767U1 (de) * 1998-02-25 2002-08-29 Ludwig Hettich & Co., 78713 Schramberg Schraube
DE202009016518U1 (de) * 2009-11-30 2010-03-04 Ho, Jen-Tong Schraube
EP3225858B1 (fr) * 2016-03-30 2018-12-12 Kuo-Tai Hsu Vis
EP3401557A1 (fr) * 2017-05-12 2018-11-14 Profix AG Vis à bois
TWM588178U (zh) * 2019-09-09 2019-12-21 吉瞬興業股份有限公司 木螺絲結構

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4488532A1 (fr) * 2023-07-04 2025-01-08 Taiwan Shan Yin International Co., Ltd. Vis

Also Published As

Publication number Publication date
CN115199628A (zh) 2022-10-18
TWI768825B (zh) 2022-06-21
US20220325740A1 (en) 2022-10-13
EP4074992C0 (fr) 2024-04-10
JP7318976B2 (ja) 2023-08-01
TW202240084A (zh) 2022-10-16
US12055174B2 (en) 2024-08-06
EP4074992B1 (fr) 2024-04-10
JP2022162954A (ja) 2022-10-25

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